Abstract: A dynamic balance type vertical vibration isolator includes slide blocks, balance springs, mass blocks, a fixed block, rotation shafts, stiffness-adjustable springs, etc. When an earthquake force is upward, the stiffness-adjustable springs are compressed, upward forces of the stiffness-adjustable springs are increased, meanwhile, the slide blocks and the mass blocks move away from the fixed block, the balance springs are stretched to generate pull forces, and the pull forces have vertically upward components, so as to reduce compression degrees of the stiffness-adjustable springs, and further to reduce the upward forces of the stiffness-adjustable springs.

Abstract: A dynamic balance type vertical vibration isolator includes slide blocks, balance springs, mass blocks, a fixed block, rotation shafts, stiffness-adjustable springs, etc. When an earthquake force is upward, the stiffness-adjustable springs are compressed, upward forces of the stiffness-adjustable springs are increased, meanwhile, the slide blocks and the mass blocks move away from the fixed block, the balance springs are stretched to generate pull forces, and the pull forces have vertically upward components, so as to reduce compression degrees of the stiffness-adjustable springs, and further to reduce the upward forces of the stiffness-adjustable springs.

Abstract: A frequency domain feedforward compensation method based on a power exponential method for a seismic simulation shaking table is provided. According to the method, a frequency domain amplitude transfer function of a system is identified, the frequency domain amplitude transfer function is modified by adjusting the power and limiting an amplitude, then an inverse frequency domain amplitude transfer function is obtained, an amplitude and a phase of a driving acceleration signal are computed, finally a time domain driving acceleration signal is obtained by using the Euler's formula for computation in a complex domain and conducting inverse Fourier transform, the shaking table is driven again to collect an acceleration signal output by a table top, whether the acceleration signal meets a shaking table test waveform use requirement is determined, a test is finished under the condition that the acceleration signal meets the shaking table test waveform use requirement.

Abstract: The present invention relates to an embedded shaking table with heavy load capacity and extensible test frequency and area, comprising a shaking table body; the shaking table body is arranged in a building foundation in which a long-stroke groove is formed, a plurality of long-stroke servo actuators are horizontally and vertically hinged in the shaking table; a short-stroke groove being formed on the upper end of the shaking table body; an excitation platform being arranged in the short-stroke groove; a plurality of short-stroke servo actuators are horizontally and vertically hinged in the shaking table. The present invention is aimed at providing a large-scale and heavy-load embedded shaking table that can meet the test requirements of realizing long stroke and high-frequency loading.

Abstract: The present invention relates to a modular shaking table with heavy load capacity and extensible test frequency and area, comprising a shaking table body; the shaking table body is arranged in a building foundation in which a long-stroke groove is formed, long-stroke servo actuators are horizontally and vertically hinged in the modular shaking table; and an integration foundation is fixedly arranged on the upper end face of the shaking table body; an excitation platform is arranged in a short-stroke groove that is formed in the integration foundation, short-stroke servo actuators are horizontally and vertically hinged in the modular shaking table. The present invention is aimed at providing a large-scale and heavy-load modular shaking table that can meet the test requirements of realizing long stroke and high-frequency loading.

Abstract: The present invention relates to a modular shaking table with heavy load capacity and extensible test frequency and area, comprising a shaking table body; the shaking table body is arranged in a building foundation in which a long-stroke groove is formed, long-stroke servo actuators are horizontally and vertically hinged in the modular shaking table; and an integration foundation is fixedly arranged on the upper end face of the shaking table body; an excitation platform is arranged in a short-stroke groove that is formed in the integration foundation, short-stroke servo actuators are horizontally and vertically hinged in the modular shaking table. The present invention is aimed at providing a large-scale and heavy-load modular shaking table that can meet the test requirements of realizing long stroke and high-frequency loading.

Abstract: The present invention relates to an embedded shaking table with heavy load capacity and extensible test frequency and area, comprising a shaking table body; the shaking table body is arranged in a building foundation in which a long-stroke groove is formed, a plurality of long-stroke servo actuators are horizontally and vertically hinged in the shaking table; a short-stroke groove being formed on the upper end of the shaking table body; an excitation platform being arranged in the short-stroke groove; a plurality of short-stroke servo actuators are horizontally and vertically hinged in the shaking table. The present invention is aimed at providing a large-scale and heavy-load embedded shaking table that can meet the test requirements of realizing long stroke and high-frequency loading.